References. Medvedev 1973: 105; Guselnikov and Medvedev 1984: 19 (as S ryptocephalus agnus Weise, 1898).
Distribution. Asian Russia (Altai, Tuva, Sayan, Transbaikalia), China, Mongolia.
Material Examined. Znamenka, 6.vii.2012, 16 (E. Akulov) (EACK); Tes, 7.vii.2012, 4 ex. (E. Akulov) (EACK); Bystraya, 25.vi.2014, 1♀ (E. Akulov) (EACK).
Notes. The species is described from the collections of F. Gebler.